CVE-2026-20956

high

Microsoft

CVSS v3 Base Score

7.8

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Published: January 13, 2026

Last Modified: January 14, 2026

Description

Untrusted pointer dereference in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

CWE-822

microsoft 365 appsmicrosoft office long term servicing channel